Is a retile enough? Retiling vs full renovation

New tiles over a tired bathroom can look like the simple answer, and sometimes they are. Whether a retile holds up depends on what the tiles are fixed to: the existing substrate, its condition and the system the new tiles will go onto. This guide sets out when a retile may be enough, when a broader renovation is the better option, and why part of the answer only shows once the old tiles are off.

By Ivan Bodnar, Bathroom Renovation Specialist, Melbourne

TILE LAYER · FIRST LOOK

Five things to check before you decide

01 Tiles that sound hollow when tapped, or move when pressed.

02 Grout that is cracking, missing or keeps failing in the same place.

03 Staining, swelling or damp marks near the shower, bath or floor edges.

04 Whether the layout, fixtures and storage still suit how you use the room.

05 Whether you want anything behind the walls changed, such as fixture positions.

These are prompts, not a diagnosis. Existing conditions are confirmed at an on-site assessment. For a fuller list, see signs your bathroom needs renovating.

THREE HONEST ANSWERS

It depends on the substrate

Tiling suitability depends on the existing substrate and the system proposed. That decides most retile questions.

A RETILE MAY BE ENOUGH

When the wear is on the surface: dated or chipped tiles, tired grout. The walls and floor underneath are sound and flat, there are no signs of moisture and the layout still works for you.

IT DEPENDS

Tiling over existing tiles, or replacing only one wall or the floor. This can suit some bathrooms. It depends on how well the existing surface is bonded and whether the proposed adhesive and tile system suits it.

A BROADER RENOVATION SUITS BETTER

When tiles are lifting across an area, there are signs of moisture, the sheeting behind is damaged, or the room no longer meets your needs. New tiles on a failing base usually just repeat the problem. See bathroom renovations.

BEHIND THE TILE · CONCEALED CONDITIONS

What shows once the old tiles come off

A tiled surface hides its own history: old adhesive, the condition of the sheeting or render, past moisture and the state of the waterproofing. Some of this can be judged before work starts. Some of it can’t. Existing conditions and concealed issues can change the scope after work begins, so Ivan explains what he can assess, what remains uncertain and why.

If the work turns out to need regulated plumbing or electrical work, appropriately licensed specialists carry out that part. Ivan may coordinate their involvement. Read more about working with licensed specialists.

DECISION SEQUENCE

Four questions worth answering first

01 Is the problem on the surface or underneath?

Cracked grout on a sound wall is a surface issue. Grout that keeps cracking, or tiles that keep lifting, often points to movement or moisture behind the tile.

02 Does the room still work for you?

New tiles change how a bathroom looks, not how it is laid out. If the shower, vanity or storage no longer suits you, a retile won’t fix that.

03 Will a retile now mean redoing it later?

If larger work is likely in a few years, tiling now may mean removing new tiles later. Talk about the timing before choosing.

04 What happens if something turns up during removal?

Ivan explains what has been found and what it means for the scope before the work goes further. The cost side is covered in understanding bathroom renovation costs.